Valve



(No Modell) Witnesses V. O. STROBEL.

VALVE.

Patented Sept. 29, 1885.

Fig.3 I

Um O Inventor Attorney N. PEIEHS. mm.

UNITED STATES PATENT OFFICE.

VICTOR O. STROBEL, OF ALLEGHENY, PENNSYLVANIA.

VALVE.

SPECIFICATION forming part of Letters Patent No. 327,117, datedSeptember 29,1885.

Application filed. February 20, 1885.

To all whom it may concern:

Be it known that I, Vrcron O. STRoBEL, of

Allegheny, Allegheny county, Pennsylvania,

have invented certain new and useful Improvements in Valves, of whichthe following is a specification.

This invention relates generally to valves, and particularly to valvesdesigned for use in connection with hot-blast apparatus.

My improvements will be understood from the following description, takenin connection with the accompanying drawings, in which Figure l is avertical diametrical section of a portion of the chimney of a hot-blaststove with my. improved valve applied, the valve being nearly closed;Fig. 2, a plan of the same with the valve and stem removed, and with aportion of the upper brick lining, D, broken away to expose the top ofthe valve-seat, a portion of the valve-seat also being broken away toexpose one of the roller tracks below it; Fig. 3, a view of the underface of the valve proper, with part broken away for exposing theinterior; and Fig. 4, a section of one of the roller-tracks. In theexample illustrated the valve proper is of the sliding-gate type.

In the drawings, A represents the sheetmetal pipe, forming in theexample illustrated the chimney of a hot-blast stove; B, a rectangularneck rigidly. secured, as by riveting, to one side of the pipe at theopening for the play of the valve; 0, the usual nose-cap bolted to theouter end of the neck; D, brick,

lining of the chimney above the valve; E, similar lining below thevalve; F, a ring, as of cast-iron, provided with a taper bore, andpermanently secured, as by riveting, in the pipe; G, avalve-seatprovided with a peripheral taper to fit the bore of the ring F, and

cast hollow for the passage of the cooling medium; H, keys engagingthrough lugs in the valve-seat and over lugs formed upon the ring F, andserving as a means for adjusting and holding the valve-seat in place; I,a coolingpipe reaching from the coolingcavity of the valve-seat tooutside the chimney; J, apertures leading from the cooling-cavity'of thevalve-seat to the chimney; K, the valve proper L, anti-friction ballsdisposed below the valve; M, channels or ball-tracks formed in thefloorof the neck B and in projections of the same (No model.)

reaching through theopening of the chimneywall; N, a spherically-seatedgland at the end of the nosecap; O, the hollow stem of the valve, fittedto reciprocate through the gland; P, a partition arranged chordwise inthe valve proper, the valve being cast hollow for the reception. of thecooling medium; Q, an aperture through the top wall of the valve proper,(Fig. 3 showing abottom view of the valve,) serving to place the coolingcavity of the valve in communication with the chimney; R, a flangeprojecting downward from the valve proper; S, a hand-hole through thechimneywall.

The valve is operated by rack and pinion, as is common, the rack beingformed in the hollow stem, as usual. The pinion is carried in hornsformed upon the gland N, which is bolted to the end of the nosecap.

Hot-blast-chimney valves are often of large size, sometimes being asmuch as five feet in diameter, and difficulty is experienced in securingconvenience and stability of structure without involving the use ofmassive valvebodies of cast-iron. I secure the short neck B permanentlyto the thin metal of the pipe, and I bolt the nose-cap to the face ofthis neck, thus providing a joint of separation independent of the neckjuncture with the thin metal of the chimney, where a reliable joint ofseparation cannot be formed. The ring F is permanently secured withinthe sheet-metal pipe at the time the neck B is attached, the same rivetsat points serving in attaching both, thesheet metalofthepipebeingfirmlyclamped between the two parts, thus giving the neck13 a firm hold upon the entire circumference of the pipe through themedium of the ring. The brick lining of the pipe is interrupted at thevalve-point, and that portion above the valve terminates below in aflare exposing the top of thevalve-seat. v

The friction of the movement of the valve is reduced by theanti-friction balls inserted below the valve, these balls rolling intracks formed in the fioor of the neck. Portions M of this floor extendthrough the chimney-wall, I

balls roll up the inclines at the end of their travel. The flange R,projecting below the valve proper at its rear, serves to prevent theimproper retreat of the balls.

Owing to the immense size of some of these valves and the lightness ofconstruction demanded by economy, and the variations in temperature towhich they are subjected, it is found very difficult to secureparallelism between the face of the valve-seat and the plane of thevalve-travel in any system of construe tion based entirely upon initialaccuracy. I overcome this trouble by fitting the valve-seat G in itssupport in such manner that it may be adjusted into conformity with theface of the valve. The valve-seat G is fitted into the ring F upon ataper of considerable steepness, one of the taper surfaces being verythin. The valve-seat is thus capableof tipping considerably and stillfit perfectly tight. This peculiar taper arrangement performspractically the office of aball-jointed seat. In cases where the seatfits upward into its holdingring, as in the illustration, I provide thekeys H, as a means for preventing the seat from dropping out of thering, and as a means for adjusting the seat in the ring. These keys aremanipulated through hand-holes S.

It should be stated that the purpose of the keys is to maintain theseatin its adjusted position rather than to serve as a means foradjustment. The seat is practically a loose fit in the ring, and is freeto rock into proper alignment with the plane of the valve. The pressureof the valve will hold the seatsnugly to the ring, and the keys serve toprevent the falling of the seat when the valve is open.

The taper may have either a straight or a curved contour, and the angleshould be about fifteen degrees. The curved and straight tapers areequivalents of each other; but the straight form is preferable onaccount of its ease of production.

The spherical seating of the gland N permits the bore of the gland to beadjusted into parallelism with the face of the valve-seat, and thuscompensate for inaccuracies of construction or later disturbance of therelation of the parts.

The valve-seat is cooled by the passage of air or water through itscavity, and this cooling of the valveseat serves also to cool the taperfit of the valve-seat within its ring. 1 show the cooling-pipe I ashaving two conduits, so as to permit water to get into the cavity ofthevalveseat and out again through the same connection; but in practiceI use this pipe as a simple inlet for air from the atmosphere, the airbeing drawn through the cavity of the valve and out at the apertures Jby the chimney-draft. In case water is used as a cooling medium theaperturesJ will of course be closed. The valve proper is cooled in asimilar manner, air from the atmosphere being drawn into it through thehollow stem and out into the chimney through the aperture Q.

The partition P prevents the current of cooling-air from taking a shortpath from the stem directly to the outletaperture, and compels it topass around the ends of that partition. In case water is used to coolthe valve, it will of course pass in and out through a double conduit inthe stem and the aperture Q will be closed.

Some of the new features of my arrangement are applicable to valvesgenerally, others only to valves of the sliding-gate type, and othersonly to valves inserted directly into the chimney-connection.

I am aware that it is not, broadly speaking, new to embody in a valve ofthe character above mentioned the combination of a cap and an adjustablegland bolted to the capavhereby the valve may be adjusted, and Itherefore disclaim such combination. The invention claimed in my firstclaim is intended to be restricted to the combination of all theparticular elements therein mentioned, or their mechanical equivalents.

I claim as my invention 1. In a gate-valve, the combination of anose-cap and a stem-gland spherically seated in the end thereof,substantially as and for the purpose set forth, 7

2. The combination of a metal pipe, a sepa rate inserted ringpermanently secured within the pipe, and a neck provided with aconcavejoint-flange fitting the cylindrical body of the pipe, and permanentlysecured to the outside of the pipe by rivets or the like engaging theneck, the metal of the pipe, and the ring, substantially as and for thepurpose set forth.

3. The combination, with a valve-seat and a sliding gate-valve, of ballsdisposed below the valve, and ball-tracks disposed below the balls,substantially as and for the purpose set forth.

at. The combination of a metal pipe pierced for the play of the valve, aneck secured at such piercing and provided with ball-tracks M,projecting into the pipe, a sliding gatevalve, and balls interposedbetween the valve and balltracks, substantially as and for the purposeset forth.

5. The combination of a sliding gate-valve, balls disposed below thevalve, and ball-tracks disposed below the balls and terminating inwardlyin upward slopes, substantially as and for the purpose set forth.

6. The combination of a sliding gatewalve, balls and ball-tracksdisposed below the valve, and a flange, R, projecting from the rear andbottom of the valve, substantially as and for the purpose set forth.

7. The combination of avalve-seat-holding ring having a straight orcurved taper bore and a valve-seat having a straight or curved taperexterior seating in such ring, and adapted for oblique adjustment,substantially as and for the purpose set forth.

8. The combination of a valve-seat having a taper periphery and a thinvalve-seat-holding ring having a taper bore engaged by the valveseat,substantially as and for the purpose set forth.

9. The combination of a valve-seat-holding ring having a taper bore anda valve-seat provided with a taper periphery engaging such ring, andhaving a cooling-passage for cooling the valve-seat and the taper joint,substantially as and for the purpose set forth.

10. The combination of a valve-seat-holding ring, avalve-seat fittingwithin the bore of such ring, and keys H, engaging the said ring,substantially as and for thepurpose set forth.

11. The combination of the chimney-pipe, a valve'seat disposed thereinand provided with a cooling-passage, a pipe leading from the atmosphereto such cooling cavity, and aperturcs J through the metal of thevalve-seat, substantially as and for the purpose set forth.

12. The combination of a pipe, avalve-seat connected therewith andprovided with a cooling-passage having an inlet and an outlet aperture,a draft-chimney or other device for producing a circulation of air, anda conduit connecting such circulating device with one of the aperturesof said cooling-cavity, substantially as and for the purpose set forth.

13. The combination of a hollow valve, an inlet through the stem fromthe atmosphere to the hollow'of the valve, an aperture, Q, through oneof the faces of the valve, and a partition, P, disposed within the valvebetween the points of stem attachment and the outlet Q, substantially asand for the purpose set forth.

VICTOR O. STROBEL. Witnesses:

JAMES A. lVIOKEAN, G. WV. BERLIN.

